اثر لارو سوسک گوشت خوار (Tenebrio molitor) غنی شده با پروبیوتیک تجاری پروتکسین بر عملکرد رشد و رنگ پوست ماهی اسکار (Astronotus ocellatus)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیلات، واحد علوم تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 گروه شیلات، واحد آبادان، دانشگاه آزاد اسلامی، آبادان، ایران

10.22034/AEJ.2022.326895.2747

چکیده

استفاده از غذاهای زنده به عنوان منابع غذایی مغذی که می‌توانند حاوی رنگدانه‌های طبیعی نیز باشند؛ برای تقویت رنگدانه پوست، بهبود عملکرد رشد و افزایش سلامت عمومی ماهیان زینتی همواره توصیه می‌شود. این مطالعه به منظور بررسی تأثیر سطوح مختلف لارو سوسک گوشت خوار غنی شده با پروبیوتیک تجاری پروتکسین بر شاخص ­های رشد، نرخ بازماندگی و رنگ پوست ماهی اسکار انجام شد. ابتدا لارو سوسک گوشت خوار با سطوح 0 (شاهد)، 0/5، 1، 1/5 و 2 درصد مکمل میکروبی پروتکسین همراه با پودر سبوس گندم به عنوان غذای اصلی به مدت 14 روز غذادهی شدند. سپس ماهیان اسکار با میانگین وزنی 0/2±3/0 گرم و طول اولیه 0/3±2/2 سانتی متر در 15 آکواریوم شیشه ­ای با تراکم 20 عدد ماهی به صورت تصادفی معرفی شدند و طی مدت 56 روز به صورت مستقیم از لارو سوسک گوشت خوار غنی شده با سطوح مختلف پروبیوتیک تجاری پروتکسین تغذیه شدند. بر اساس نتایج، حداکثر میزان وزن کسب شده (0/23±10/5 گرم)، افزایش وزن بدن (0/31±7/54 گرم)، نرخ رشد روزانه (0/34±4/56 درصد)، نرخ رشد ویژه (0/10±2/11 درصد/روز) و رشد طولی (0/5±3/5 سانتی متر) در تیمار 2 درصد لارو سوسک غنی شده با پروبیوتیک پروتسین نسبت به سایر تیمارها مشاهده شد (0/05>P). بیش ترین ضریب تبدیل غذایی مربوط به تیمار شاهد (0/17±1/25) و کم ترین آن مربوط به تیمار 2 درصد (0/05±0/84) بود. هر چند که اختلاف معنی داری در درصد بازماندگی بین تیمارهای دریافت کننده لارو سوسک گوشت خوار غنی شده با پروبیوتیک تجاری پروتکسین وجود نداشت (0/05<P). در خصوص رنگ پذیری پوست ماهی در تیمار 2 درصد کاهش و افزایش معنی داری به ترتیب در خصوص مولفه­ روشنایی (L*) و قرمزی (a *) نسبت به سایر تیمارها به ویژه تیمار شاهد مشاهده شد (0/05>P). در مجموع، تأثیر سطوح مختلف لارو سوسک گوشت خوار غنی شده با پروبیوتیک تجاری پروتکسین به ویژه در سطح 2 درصد خوراک روی شاخص‌های رشد و رنگ پوست ماهی اسکار کاملاً مثبت و معنی دار ارزیابی شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of mealworm (Tenebrio molitor) larvae enriched with a commercial probiotic, Protexin, on growth performance and skin color in Oscar (Astronotus ocellatus)

نویسندگان [English]

  • Emdad Dadvar 1
  • Seyed Pezhman Hosseini Shekarabi 1
  • Elham Khazaie 1
  • Jafar Ehsani 2
  • Mehdi Shamsaie Mehrgan 1
1 Department of Fisheries Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Department of Fisheries, Abadan Branch, Islamic Azad University, Abadan, Iran
چکیده [English]

Using live feed as nutritious feed sources that can also contain natural pigments; is always recommended to strengthen skin pigment, improve growth performance and increase the general health of ornamental fish. This study was conducted to evaluate the effect of different levels of mealworms (Tenebrio molitor) larvae enriched with commercial probiotic, Protexin on some growth factors, survival rate, and skin color of Oscar (Astronotus ocellatus). First, the mealworms larvae were fed with 0 (control), 0.5, 1, 1.5 and 2% of a commercial Protexin probiotic along with wheat bran powder as the main feed resource for 14 days. Then, Oscar fish with an average weight of 3.0 ± 0.2 g and an initial length of 2.2 3 0.3 cm were randomly distributed into 15 glass aquariums with a density of 20 fish and were fed for 56 days with the enriched mealworms larvae with Protexin. Based on the results, weight gain (10.5 ± 0.23 g), body weight gain (7.54 ±0.31 g), daily growth rate (4.56 ± 0.34), specific growth rate (2.11 ±0.1), and longitudinal growth (3.5 ± 0.5 cm) in 2% treatment showed a significant difference compared to the control group and other treatments (P<0.05). The highest feed conversion ratio was obtained in control (1.25 ±0.17) and the lowest value was observed in 2% treatment (0.84 ±05). However, there was no significant difference in survival percentage between treatments receiving diets containing larvae enriched with probiotic, Protexin. The fish skin color according to L * and a * indices in the 2% treatment had a significant decrease compared to other treatments, especially the control treatment (P<0.05). The effect of different levels of mealworms larvae enriched with commercial probiotic, especially at the level of 2% feed on the growth indices and skin color of Oscar fish was evaluated as completely positive and significant.

کلیدواژه‌ها [English]

  • Mealworms (Tenebrio molitor) larvae
  • Protexin probiotic
  • Oscar (Astronotus ocellatus)
  • Growth performance
  • Skin color

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فصلنامه محیط زیست جانوری
دوره 14، شماره 4
بهمن 1401
صفحه 181-186

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